Preschooler with seizures for the last 3 days

MRI of brainstem glioma
Sagittal T1 MRI without contrast of the brain (above left) shows a large mass expanding the entire brainstem. Axial T2 (above right) and axial FLAIR (below left) MRI show the mass to be somewhat heterogenous and the mass has multiple foci of enhancement on the axial T1 MRI with contrast (below right).

The diagnosis was brainstem glioma.